How to quickly diagnose and repair, and causes of a P3457 diagnostic code which indicates an open state in cylinder 8 deactivation or intake valve control circuit.

Symptoms of P3457 OBD II Trouble Code

Engine may misfire

Increased fuel consumption

Poor engine performance

Service engine soon light illuminated

Check engine light illuminated

Common Causes of P3457 OBD II Trouble Code

Defective cylinder deactivation solenoid

Low engine oil level or pressure

Restricted oil passage

Faulty or damaged wiring

Corroded, damaged or loose connector

Defective ECM

Severity of P3457 OBD II Trouble Code

The severity of this code can vary tremendously from moderate to severe depending on the specific symptoms of the malfunction. A misfire requires immediate attention because it can cause permanent damage to internal engine components.